verilator/test_regress/t/t_lint_unused_bad.v

// DESCRIPTION: Verilator: Verilog Test module
//
// This file ONLY is placed under the Creative Commons Public Domain, for
// any use, without warranty, 2010 by Wilson Snyder.
// SPDX-License-Identifier: CC0-1.0

module t (/*AUTOARG*/);

   sub sub ();

endmodule

module sub;

   wire pub /*verilator public*/;   // Ignore publics

   wire [5:0] assunu1 = 0;  // Assigned but unused

   wire [3:0] assunub2 = 0;  // Assigned but bit 2 unused

   wire [15:10] udrb2;  // [14:13,11] is undriven
   assign udrb2[15] = 0;
   assign udrb2[12] = 0;
   assign udrb2[10] = 0;

   wire       unu3;  // Totally unused

   wire [3:0] mixed;  // [3] unused & undr, [2] unused, [1] undr, [0] ok
   assign mixed[2] = 0;
   assign mixed[0] = 0;

   wire [2:0] cmdln_off;  // Suppressed by command line
   assign cmdln_off = 0;

   localparam THREE = 3;

   parameter UNUSED_P = 1;
   localparam UNUSED_LP = 2;

   genvar     unused_gv;
   genvar     ok_gv;

   // verilator lint_off UNUSEDSIGNAL
   wire linter_sig1;
   localparam linter_param1 = 1;
   genvar linter_genvar1;
   // verilator lint_on UNUSEDSIGNAL

   // verilator lint_off UNUSEDPARAM
   wire linter_sig2;
   localparam linter_param2 = 2;
   genvar linter_genvar2;
   // verilator lint_on UNUSEDPARAM

   // verilator lint_off UNUSEDGENVAR
   wire linter_sig3;
   localparam linter_param3 = 3;
   genvar linter_genvar3;
   // verilator lint_on UNUSEDGENVAR

   // verilator lint_off UNUSED
   wire linter_sig4;
   localparam linter_param4 = 4;
   genvar linter_genvar4;
   // verilator lint_on UNUSED

   case (2)
     1: begin : named
        localparam BLOCK_PARAM = 10;
     end
     2: begin : named
        localparam BLOCK_PARAM = 20;
     end
     3: begin : named
        localparam BLOCK_PARAM = 30;
     end
   endcase

   initial begin
      if (0 && assunu1[0] != 0 && udrb2 != 0) begin end
      if (0 && assunub2[THREE] && assunub2[1:0]!=0) begin end
      if (0 && mixed[1:0] != 0) begin end
      if (named.BLOCK_PARAM != 20) $stop;
   end

   generate
      if (0) begin : gen_gv_if0
         for (ok_gv = 0; ok_gv < 1; ++ok_gv)
           begin : gen_gv_if0_for
           end
      end
   endgenerate

endmodule